The ratio of boys to girls at a school is 9 to 11. If 400 students attend the school, how many are girls? 50 140 220 215

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24-04-2019
Mathematics

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The ratio of boys to girls at a school is 9 to 11. If 400 students attend the school, how many are girls? 50 140 220 215

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elizabeth287 elizabeth287 · Answer 1 · 2019-04-24T22:19:54+02:00

elizabeth287 elizabeth287

24-04-2019

It would be 220 because 20 students in all, 20×20 is the 400 students. so if you just multiplied the 9 and 11 by 20, it would match up with 400 students and you would have 220 girls. (This is not how most people work this out, but I hope it helped).

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